CN104609825B - A kind of heat-insulation and heat-preservation inorganic coating and preparation method thereof - Google Patents
A kind of heat-insulation and heat-preservation inorganic coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of inorganic heat-insulating coating and preparation method thereof.Aerogel material superthermal insulation function is combined with functions such as magnesium phosphate cementing material (MPC) distinctive waterproof flame retardants and is prepared from by this coating.The inorganic aqueous heat insulating coatings of the present invention, compared with current existing organic polymer aeroge composite coating and normal silicate aeroge composite coating, has that thermal conductivity is low, water-tolerant, flame-retardant are good, the advantageous feature of environmental protection and energy saving.The composite can be widely applied to residential building, school, hospital; the inner-outer wall of the public buildings such as Factory Building is heat insulation with roof of storied building; the numerous areas such as the large volume such as bridge, dam is built or the anti-flatulence of heat type injury protection of facility, the protection that steamer, train, bus top day show up.
Description
Technical field
The present invention relates to heat insulating coatings and preparation method thereof, be specifically related to a kind of aerogel powder and inorganic aqueous heat insulating coatings that magnesium phosphate cementing material (MPC) combines and preparation method thereof.
Background technology
SiO2Aeroge is a kind of mutually gathering with nanometer scale particle to be constituted nanoporous network structure, and in hole, it is full of a kind of high dispersive solid-state material of gaseous state disperse medium, because it has nano-porous structure, low-density, low-k, low thermal conductivity, high porosity, the features such as high-specific surface area, at mechanics, acoustics, calorifics, the aspects such as optics demonstrate peculiar property, in space flight, military, oil, chemical industry, mineral products, communication, medical, building materials, electronics, the various fields such as metallurgy have extensive and huge using value, it is referred to as " changing the magical material in the world ".
Aeroge, as a kind of novel heat-insulating heat-preserving material, has been a great concern.Network structure and the feature such as high porosity and low-density that aeroge is unique cause the features such as the intensity of aeroge own is low, fragility is big, be easily broken the most under stress, mechanical strength low.Therefore, in a lot of fields, aeroge is difficult to be used alone as heat-barrier material.The aerogel products of industrialized production mostly is powder body at present, and this brings limitation also to the application of aeroge.In order to overcome these shortcomings of aeroge, aeroge is combined by researcher with other materials, produces and not only has excellent heat-insulating property but also have the composite nano hole super insulating material of some strength.
When aerogel powder and coating are mixed with compound heat-insulation coating, can not be limited by space, area and heat insulation object, only this insulating moulding coating need to be coated on heat insulation object.Aeroge, as a kind of high-performance additives, after a small amount of interpolation, can be obviously improved the heat-proof quality of coating, can have the properties such as sound insulation simultaneously.Aerogel powder is combined with each other with coating material, convenience and the feature of two aspects of aerogel heat-proof function admirable of coating application can be made full use of.The patent such as patent CN201010601347, CN201210023962, CN201210230531, CN201210559548 and CN201310242852 discloses and is combined with polymer waterborne emulsion (or latex) by aerogel powder (or granule), prepare aeroge organic composite type coating, obtain preferable heat-proof quality, but containing more organic principle in aeroge organic composite type coating system, causing whole coating non-refractory, anti-flammability is poor；Mention combining aerogel powder with inorganic silicate (potassium silicate, sodium silicate) in patent CN201310228556 and be prepared as coating, but inorganic silicic acid salt system is weak to water, limits its application.
Magnesium phosphate cementing material (MPC) is mainly by magnesium oxide with soluble phosphate and retarder etc. according to a certain percentage, being changed generation under normal temperature condition is the inorganic adhesive of novel reaction curing type cohering phase by soda acid chemical reaction and physical action with phosphate, it have accumulated the major advantage of cement, pottery and refractory material, belongs to the cementing material of chemical bonds.Compared with organic polymer and normal silicate, MPC has water-tolerant, cryogenic temperature condensation is fast, durability is strong, adhesion strength is high, drying shrinkage is little, wearability, frost resistance are good and the advantage such as flame-retardant.
Summary of the invention
It is an object of the invention to: a kind of novel inorganic aqueous coating using aeroge as thermal insulating filling is provided, this coating is mainly prepared from aerogel powder and magnesium phosphate cementing material (MPC) hybrid reaction, has that thermal conductivity is low, water-tolerant, flame-retardant are good, the feature of environmental protection and energy saving.
The purpose of the present invention completes in the following manner:
A kind of heat-insulation and heat-preservation inorganic coating, containing following components: magnesium oxide: 100 mass parts；Soluble phosphate: 15 ~ 40 mass parts；Retarder: 1 ~ 10 mass parts；Aeroge water paste: 5 ~ 100 mass parts；Dispersant: 0.1 ~ 5 mass parts；Filler: 0 ~ 30 mass parts；Chopped fiber: 4 ~ 20 mass parts；Defoamer: 0.1 ~ 5 mass parts；Silane coupler: 0.5 ~ 5 mass parts；Deionized water: 20 ~ 200 mass parts；
Described soluble phosphate is at least one in potassium dihydrogen phosphate, ammonium dihydrogen phosphate；Described retarder is Borax；At least one in described dispersant polyacrylamide, Polyethylene Glycol, glyceryl tristearate, Tween-60 and tween 80；Described filler is at least one in nano silicon, nano titanium oxide, nano zircite, nano aluminium oxide；Described chopped fiber is at least one in Short Mullite Fibre, glass fibre；Described defoamer is at least one in polydimethylsiloxane, methanol, ethanol, propylene glycol；Described silane coupler is at least one in alkylalkoxy silane, vinyl alkoxy silane, aminoalkylalkoxysilane.
The preparation of described heat-insulation and heat-preservation inorganic coating comprises the steps:
(1) preparation of aeroge water paste
The surfactant taking 1 ~ 5 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5 ~ 3h, obtain aeroge water paste under 400 ~ 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
According to conventional coating production method, each material is mixed, agitated be uniformly dispersed, i.e. prepare heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
In order to the present invention is better achieved, described surfactant is sodium octyl, C13-17 SAS, C14-18 α-sodium olefin sulfonate, lauric acid formicester α-sodium sulfonate, sodium octyl sulfate, sodium lauryl sulfate, ammonium lauryl sulfate, lauryl sulfate diethanolamine, lauryl polyethenoxy ether sodium sulfate, lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, tallow trimethyl ammonium chloride, two cocoyl alkyl dimethyl ammonium chlorides, DDAC, stearyl phosphate ester glycine betaine, Tryfac 5573 glycine betaine, lauryl dimethyl amine oxide, at least one in cocamide dimethylamine oxide.
Relative to prior art, the invention have the advantages that and beneficial effect:
The inorganic aqueous insulating moulding coating of the present invention is to be prepared from by aerogel powder and magnesium phosphate cementing material (MPC) hybrid reaction, compared with current existing organic polymer aeroge composite coating and normal silicate aeroge composite coating, have that thermal conductivity is low, water-tolerant, flame-retardant are good, the advantageous feature of environmental protection and energy saving.The composite can be widely applied to residential building, school, hospital; the inner-outer wall of the public buildings such as Factory Building is heat insulation with roof of storied building; the numerous areas such as the large volume such as bridge, dam is built or the anti-flatulence of heat type injury protection of facility, the protection that steamer, train, bus top day show up.
Detailed description of the invention
Below in conjunction with examples of implementation, the detailed description of the invention of the present invention is described in further detail.
Embodiment
1
(1) preparation of aeroge water paste
The octyl sulfonic acid natrium surfactant taking 1 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
In magnesium oxide 100 mass parts, potassium dihydrogen phosphate 15 mass parts, Borax 10 mass parts, aeroge water paste 100 mass parts, polyacrylamide 1 mass parts, nano silicon filler 10 mass parts, glass fibre 5 mass parts, polydimethylsiloxane defoamer 2 mass parts, silane coupler 2.5 mass parts and the ratio of deionized water 50 mass parts, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
Embodiment
2
(1) preparation of aeroge water paste
The lauryl polyethenoxy ether sodium sulfate surfactant taking 2 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
In magnesium oxide 100 mass parts, potassium dihydrogen phosphate 15 mass parts, Borax 2 mass parts, aeroge water paste 5 mass parts, Polyethylene Glycol 0.5 mass parts, glass fibre 8 mass parts, methanol 2 mass parts, silane coupler 3 mass parts and the ratio of deionized water 20 mass parts, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
Embodiment
3
(1) preparation of aeroge water paste
The tallow trimethyl ammonium chloride surfactant taking 3 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
In magnesium oxide 100 mass parts, potassium dihydrogen phosphate 40 mass parts, Borax 6 mass parts, aeroge water paste 100 mass parts, glyceryl tristearate 2 mass parts, nano titanium oxide filler 30 mass parts, glass fibre 15 mass parts, ethanol 0.1 mass parts, silane coupler 1 mass parts and the ratio of deionized water 200 mass parts, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
Embodiment
4
(1) preparation of aeroge water paste
The cocamide dimethylamine oxide surfactant taking 4 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
It is 1 mass parts, nano zircite 10 mass parts, Short Mullite Fibre 10 mass parts, propylene glycol 5 mass parts, aminopropyl triethoxysilane 5 mass parts and the ratio of deionized water 100 mass parts in magnesium oxide 100 mass parts, ammonium dihydrogen phosphate 20 mass parts, Borax 5 mass parts, aeroge water paste 50 mass parts, Tween-60, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
Embodiment
5
(1) preparation of aeroge water paste
The stearyl Phosphobetain Surfactants taking 5 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts, disperses 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
It is 5 mass parts, nano aluminium oxide 20 mass parts, Short Mullite Fibre 4 mass parts, polydimethylsiloxane 1 mass parts, MTES 0.5 mass parts and the ratio of deionized water 150 mass parts in magnesium oxide 100 mass parts, ammonium dihydrogen phosphate 30 mass parts, Borax 10 mass parts, aeroge water paste 60 mass parts, tween 80, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
Embodiment
6
(1) preparation of aeroge water paste
The two cocoyl dimethylammonium chloride ammonium surfactants taking 2.5 mass parts are dissolved in the water of 100 mass parts, add the aerogel powder of 25 mass parts, disperse 0.5h, obtain aeroge water paste under 2000 r/min high-speed stirred；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
In magnesium oxide 100 mass parts, ammonium dihydrogen phosphate 20 mass parts, Borax 1 mass parts, aeroge water paste 70 mass parts, polyacrylamide 0.1 mass parts, nano silicon 5 mass parts, nano aluminium oxide 10 mass parts, Short Mullite Fibre 20 mass parts, polydimethylsiloxane 3 mass parts, tetraethyl orthosilicate 2 mass parts and the ratio of deionized water 80 mass parts, being mixed by each material, dispersed with stirring uniformly, i.e. prepares heat-insulation and heat-preservation inorganic coating；Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating surface with heat preservation and insulation.
With reference to the countries concerned or industry standard, embodiments above is carried out performance detection, result such as following table:
Claims (3)
1. a heat-insulation and heat-preservation inorganic coating, it is characterised in that containing following components:
Magnesium oxide: 100 mass parts；Soluble phosphate: 15～40 mass parts；Retarder: 1～10 mass parts；Aeroge aqueous is starched
Material: 5～100 mass parts；Dispersant: 0.1～5 mass parts；Filler: 0～30 mass parts；Chopped fiber: 4～20 mass parts；Disappear
Infusion: 0.1～5 mass parts；Silane coupler: 0.5～5 mass parts；Deionized water: 20～200 mass parts；
Described soluble phosphate is at least one in potassium dihydrogen phosphate, ammonium dihydrogen phosphate；Described retarder is Borax；Described
Dispersant polyacrylamide, Polyethylene Glycol, glyceryl tristearate, Tween-60 and tween 80 at least one；Institute
The filler stated is at least one in nano silicon, nano titanium oxide, nano zircite, nano aluminium oxide；Described
Chopped fiber is at least one in Short Mullite Fibre, glass fibre；Described defoamer be polydimethylsiloxane, methanol,
At least one in ethanol, propylene glycol；Described silane coupler is alkylalkoxy silane, vinyl alkoxy silane, ammonia
At least one in alkylalkoxy silane.
The preparation method of heat-insulation and heat-preservation inorganic coating the most according to claim 1, it is characterised in that: described heat-insulation and heat-preservation is inorganic
The preparation of coating comprises the steps:
(1) preparation of aeroge water paste
The surfactant taking 1～5 mass parts is dissolved in the water of 100 mass parts, adds the aerogel powder of 25 mass parts,
Disperse 0.5～3h under 400～2000r/min high-speed stirred, obtain aeroge water paste；
(2) preparation of heat-insulation and heat-preservation inorganic coating and coating
According to conventional coating production method, each material is mixed, agitated be uniformly dispersed, i.e. prepare heat-insulation and heat-preservation inorganic coating；Will
Prepared heat-insulation and heat-preservation inorganic coating is coated in substrate surface, normal temperature drying 7 days, obtains the coating with heat preservation and insulation
Surface.
The preparation method of heat-insulation and heat-preservation inorganic coating the most according to claim 2, it is characterised in that:
Described surfactant is sodium octyl, C13-17 SAS, C14-18 α-sodium olefin sulfonate, lauric acid first
Fat α-sodium sulfonate, sodium octyl sulfate, sodium lauryl sulfate, ammonium lauryl sulfate, lauryl sulfate diethanolamine, lauryl
Polyoxyethylene ether ammonium sulfate, lauryl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, tallow trimethyl ammonium chloride, two
Cocoyl alkyl dimethyl ammonium chloride, DDAC, stearyl phosphate ester glycine betaine, Tryfac 5573 glycine betaine,
At least one in lauryl dimethyl amine oxide, cocamide dimethylamine oxide.
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